Plastic hatsrial ato method



NATHAN LE PATENT OFFICE ""TEURST, NEW YORK.

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An object oi the present invention is the provision of an improved plastic for nmldinoor pressing into desired shapesv further ob ect is the provision of an .ixuooved pro, as for making plastic mat by prec i I pitati soluble soapor drying oil mixed with suitable fibrous ma terial or tiller to form a Water insoluble product.

in performing the process a i suitable fibrous material, such as pa er pulp. asbestos or the like or other suital'ilo ine t substance and a solution oi soluble soap 0 1 i such as sodium linoleatc. other simil r substan itcd rr' h a metallic capable ot forming a Water insoluble campound with the soap 0' the drying; oil to precipitate an insoluble soap in the mixture of fibrous material, This n ture is passed through a beater or other pe of agitating machine to thoroughly mix the fibrous material and the insoluble soap is then filtered and the solution drained oil": The residue then disintegrated, dried, and oxidized. This oxidation consists in allowing the insoluble soap oi? the drying oil to take up its proportion of oxygen and has a reaction substan tially similar to the drying of a linseed oil paint. lit may be hastened by any of the methods ordinarily employed to hasten the drying oi paint, such as the circulation of heated air the use of catalytic agents, and the like After the oxidation is ap 1922. Serial No. 564,232.

proximately completed, the material is removed from the drier and is disintegrated in a mill or disintegrator to form a homo geneous mass. The material is then ready to be molded by heat and pressure into the desired shapes.

In a typical embodiment of the invention. a suitable fibrous material, such as cotton, paper pulp, asbestos or other inert material is disintegrated in Water by means of a paper heater or other suitable machine until a pulp of the desired fineness is obtained. A water solution of a soluble soap of a drying oil, such as a soda soap of linseed oil and preferably of boiled oil is added to the fibrous material and the beater run for a suilicient length oi time, about fifteen minutes to incorporate the soap in tl libre. Pi solution of a metallic salt. capable of forming an insoluble soap is then added to the material and the insoluble soap precipitated. Various salts may be employed for this purpose, such as lead nitrate, aluminum sulfate. calcium chlorid and other salts soluble in Water and capable of forming an insoluble linoleate.

'lie beater is then run for a short period of time less than one-half hour and the mixed pulp is then run to a filter bed or other suitable device to drain the excess solution. The residue is preferably Washer free, or reasonably tree of soluble salts formed such sodium sulfate sodium chlorid and the like. and is then picked apart into small pieces and placed in a drier or other suitable apparatus to dry the material ano oxidize the insoluble soap. the drying process. it is preferable to employ a current oi Warm passing through the material to hasten oxidation. Various temperatures may be employed, depending upon the nature of the fibrous material. A ten'iperature up to 100 C., or even higher may be employed under some 0 nditions. After the oxidation is approximately completed, the material is disintegrated in a mill to form a homogeneous mass, and it is then ready to be molded by heat and pressure into desired shapes.

D es or pigments may be added to produce objects of desired colors. They may be added to the beater before the addition of the metallic salt or after, depending upon the particular nature of the composition being treated and the nature of the dye added. Pitch. or other materials, to give special properties, may be added in the heater 4''" in the mill used after oxidation.

The process set forth may be Varied within Wide limits as for instance, the metallic salt may be first added to the fibrous mate rial and the solution of the soap of the dry ing oil added afterward. The proportion of a soap of a drying oil may be Varied within wide limits. Under some conditions, a very small amount is employed merely furnishing a small proportion of oxidized material in the mixture, and under some conditions, the linseed oil or other drying oil may be present in excess of that required to combine with the metallic salt, whereby a more flexible material may be produced and one that may be more easily Worked with cutting tools.

In place of linseed oil, l: may en'i-ploy soaps of other drying oils, such as tung oil, perilla oil, fish oil and the like.

While l have described in detail the pre ferred practice of my process, it is to be understood that the details of procedure, and proportion of ingredients may be widely 'aried, and that known chemical equivalents may be employed in place of the materials mentioned, without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, 1 claim:

1. A plastic material consisting of a fibrous substance, and an oxidized insoluble soap 01": a drying oil.

2. A plastic material consisting of a fibrous substance, and an oxidized insoluble soap 0t linseed oil.

3. A plastic material consisting of a fibrous sul stance, and an oxidized metallic insoluble soap ot a drying oil.

4-. A plastic material consisting of a fibrous suibstance. and an oxidized metallic insoluble soap of? linseed oil.

The process of meking; plastic material which consists in impregnating a fibrous substance with a soluble soap of a drying oil, adding a solution ota metallic salt adapted to form an insoluble compound with nee nos? the soap, drying the material, oxidizing the precipitated soap containeo in the material, and disintegrating the material.

6. The process of making plastic material which consists in impregnating a fibrous substance with a soluble soap oi linseed oil, adding a solution of a metallic salt adapted to form a water insoluble compound with the soap, drying the material, oxidizing the precipitated soap contained therein, and disintegrating the material.

7. The process of making; plastic material which consists in impregnating a fibrous substance with a soluble soap of drying oil, adding a solution of aluminum sulfate to form an insoluble soup, drying the material, oxidizing the precipitated soap contained therein, and disintegrating the ma terial.

8. The process of making plastic material which consists in impregnating a. fibrous substance with a soluble soap of linseed oil, adding a solution of aluminum sulfate to form an insoluble soap, drying the material, oxidizing the precipitated soap contained therein, and disintegrating the material.

9. The process of making plastic material which consists in impregnating u. fibrous substance with a. soluble soup of a. drying oil, adding a solution of a metallic salt adapted to form an insoluble compound with the soap, drying the material, oxidizing the precipitated soap contained in the material, disintergrating the material, and molding and pressing it into: the desired form.

The process oi making plastic material. which consists in impreenating a fibrous substance with a soluble soap of linseed oil, adding a solution of a. metallic salt adapted to form an insoluble compound with the soap, drying the material, oxidizing the pre cipitated soap contained in the material, disintegrating the material, and molding end pressing it into the desired form In testimony whereof, I aiiix my signature in presence of two witnesses.

NATHAN Ra LEVY. lVitnesses L. V. Enron,

P. BHAGWAT. 

